Friction-buffer for railway-cars.



G. A. JOHNSON.

FRICTION BUFFER FOR RAILWAY CARS.

APPLICATION FILED NOV. 25, 1910.

Patented May 16, 1911.

2 SHEETS-SHEET 1 v2W m n 2% m M w E m G. A. JOHNSON. FRICTION BUFFER FOR RAILWAY CARS.

APPLICATION FILED NOV. 25, 1o10. 992,428, Pateilted May 16, 1911.

'2 SHEETS-SHEET 2.

George )4. J b/2x750.

, 7 .h M I 4 tion.

MA L COPY UNITED STATES PATENT c arion.

enema AfJOHNSON, or cnrcnee, ILLINOIS, ASSIGNOR' 'ro WiLLIAM H. MINER, or

- CHICAGO,

ILLINOIS.

rnrc rron-nvrrnn EOR number-cams.

To all whom it may concern; I

Be it known that I, GEORGE A, JOHNSON,

a citizen of the United States, residing in Chieago, in the county of Cook and St'ate of Illinois, have invented a new and useful Improvement in Friction-Butters for Railway- Cars, of which the following is a specifica- My invention relates toim rovements in friction buffers for railway passenger cars.

The object of my invention is to provide a friction bufl'er suitable for use onjrailway' passenger cars, wh1ch 'lll' be of a strong,-

. simple, eiiicientand durable construction,

which will "becompact in form while providing'for the necessary extended movement of the buffer bar, irf which all the parts mayv be permanently connected together and I adapted to be conveniently and quickly ap plied to or removedlfroin the car. i," I

Myinvention consists in the novel coni struetion of parts and, devices and in-the novel combinations of parts and devices herein shown and described. and more particularly specified in the claims H In the accompanying drawing forming a part of this specification, Figure 1 is a cen-. tral, vertical section of a friction butler embodying my invention," certain oft-he partsbeing shown-in elevation. Fig.2 is across and 5 are detail, Vertical sections of the buffer mechanism, showin the same-at Fig. 3 uncompressed, at .Fig' 4 partially compressed, and at: Fig. 5 compressed. Fig. 6

is a detail, cross section on line ,66 of Fig,

Y 10 10 'of Fig. 5.

In the drawing, 1 represents a portion of the car frame, 2 the-buffer cage or "cradle;

secured to or-formingpa rt of the car frame, 3 the steel floor plate .of the vestibule qf-the car, 4 thebuffer plate carrying the y'movable fioor plate 5, and 6 the buil'er bar. 3

The buffer frame or cradle 2'has-an' upright transverse member 7, againstgwhich abuts the rear end of the friction shell'or cylinder 8, which contains at its front portion the friction shoes 9, wedge 10 and interposed anti-frictionrollers 11. At its rear Specification of Letters Patent. .lpplicationjiled November 25, 1910. Serial No.;594,10 3.

Patented May 16, 1911.

| end, the buffer bar'engages a buffer cap or block 12, which has a socket 13 to receive the rear end of the butter bar, an annular chamber 14 to receive and support the front end of the main or primary buffer spring 15, which is interpos shoes 9 and-said buffer cap 12.

The buffer cap 12 has an integral, central, hollow stud or thrust member 16, the inner end of which engages or abuts against the front .end of the wedgeIO after the main or primary buffer spring 15 has been comnism as a whole being at this time only partially compressed. 'The bufi'er cap 12 also has an integral-external stop member 17 adaptedto abut against the front end 18 of the'friction "shell 8, and thus limit the inwa-rd movementsofthe buffer-bar and pre vent the springs-,from being compressed completely solid. i

Thp supplemental of secondary buffer springs 19'and 20 are interposed between fthe' fr iction shoes 9 and the friction shell 8, I the spring 20 being'h smaller spring fitting and nesting within thelarger spring 19.

stroxiger than't-he main or primary bufier' spring 15,. the capacity. of the ;-secondary bufler springs 19, 20 being*prefer'ably sevraltim'es that'qf the primary butter spring 15, so that when the latter is fully com- 20 will only be slightly compressed, and the friction shoes 10 will have only made asmall portion oftheir' total. movement; This will be understood fromFigs. 3, 4 and 5 of the drawing. "The friction shoes 9 are fur.-

21 for the outer end of the smaller spring 20 to bear against, the, innerend of this spring bearing against a cap or seat member 22 with which, the friction shell is'provided to form a seatfqr shoulder for the inner end of'the larger spring 1;9 to bear against. flange 23 ofi'hefriction shell has an annular recess 24, to receive an external flange 25 on the cap 22.

pressed, as shown in-Fi'g. 4, the buffer mecha pressed,"as shown in Fig. 4', the springs 19,

V at its rcarend -The friction shell has at its rear end an inwardly projecting flange 23' This ed between the friction The secondarybuflfersprings 19. 20am much nisbed with an interna-l'flange or shoulder All the parts of the buffer are connected together in assembled position and in com pact form by means. of a. central connecting bolt ,or rod 26, having a threaded nut 27 at its rearend, fitting inihfslchamber of. the...

a w" east MM NE 2 H i a 992,428 I or shoulder 31 on the hollow stud or thrust member 16 of the front cap or buffer block 12. When the parts are assembled, as shown inaFig. 3, the stop thimble .28, which is interposed between the head of the connecting bolt and the wedge 10, enables the secondary butter springs 19, 20 to be put under an initial compression by the connecting bolt sufficient to take "up and compensate for all wear of the friction cushioning mech anism. The connecting bolt also enables the main bufier spring 15 to be put underan initialcompression when the parts areas-1 sembledl As the front 'bufier'cap or block 12, the main. and secondary buffer springs, the friction shell, friction shoes, Wedge and rollers are all connected together in assembled position, as onepiece, b the connect ing bolt or rod 26, the bu er cushioning mechanismmay be very quickly and conveniently applied to or removed front-"the; car as occasion may requ re. i

-To hold the friction shell or cylinder 8 rigidly in-place in the buffer frame or cradle 2, I provide the same with removable anchor straps or bands 32, having threaded ends 33, furnishedwith nutsfi t and ,cotters 35. Thebuffer frame or cradle 2 is further provided with a separate piece or removable bottom plate 36.

- The rima s rin is su ported and centered aii its f z hniz end by tiiecntral thrust member 16 of the front buffer cap 12, and at its rear end by the wedge 10 which has a circular or cylindrical extension 37 to enable it to perform this spring centerin and supporting function.

I claim .1. In a .friction buffer, the combination with a buffer bar and front bufi'er cap, of

a friction shell and friction shoes and wedge within the shell, a primary buffer'spring reacting at one "end against the front buffer cap and at its other end agamst said friction shoes, a secondary buffer spring reacting at one end against the'frietipn shell and at itsother end against the friction shoes, said front buffer cap acting through the.

wedge and'frietion shoes to compress'the the front bu secondary bufier spring after the main buffersprin hasbeen compressed, substantially as speci ed;

a buffer bar and front bufi'er cap, of a friction 4 f In a friction buffer, the combination with': I

shell and friction shoes and wedge within the shell, a primary bufier spring reacting at one end against the front buffer-cap and atits other end against said friction shoes, a secondary bufi'er spring reacting atone end against theafriction, shell and at its' other end against the friction shoes, said;

'front buffer cap acting through the wedge and-friction shoes-to compress the secondary ,bufi'er spring after the main buffer spring a has been com ressed, and a rod-connecting the .front bu er cap with the friction shell,

substantially as specified.

3. In a friction buffer, the combination with a buffer bar ,and front buffer cap, of a friction shell and friction shoes and wedge. i

within the shell, a primary 'buifer spring 're-.

acting at one-end against the front buffer;

cap and atits other end against said friction shoes,.a secondary buffer springreacting at I, one-end against the friction shell and, at itsother. end against'the' friction shoes, said .1

front buffer cap acting, through the wedge,v and friction shoesto compresstheiseeondary buffer spring after the main buffer spring has been coinipressed, and a rod connecting er' ca specified.

friction -shell and friction shoes and wedge with the friction shell,-. 'said connecting ro having a thimble atone end engaging the Wedge, substantially aswithin the shell, a primary bufi'er spring,

reactin at one end against the front buffer 1? at its other end against said frlctlon ar an L shoes,a secondary buifer spring reacting at oneend against the frictionishell and at its and friction shoes to compress the secondary other end against the friction shoes, sai d front bufi'er cap.a'ctin'g through the wedge said connecting ro having a thimble at one I end engaging-the wedgeasai'd thimble h8V- 1 inga flange at its front end engagin said 1 front bufi'er cap, substantially as s "i ed. GEORGE A. JOB sou.- Witnesses; a

PEARL ABRAMB, H. M, MUNbAv 

